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234 lines
6.8 KiB
PHP
234 lines
6.8 KiB
PHP
<?php
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require_once 'prepend.inc';
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# this serves three different forms of the calendar data:
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# * a monthly view ($cm, $cy)
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# * a daily view ($cm, $cd, $cy)
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# * an individual item view ($id)
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# if we encounter an error display an event or a day, we display the current
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# month (or the month of the requested day)
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$begun = 0;
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$id = isset($id) ? (int)$id : 0;
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$cy = isset($cy) ? (int)$cy : 0;
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$cm = isset($cm) ? (int)$cm : 0;
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$cd = isset($cd) ? (int)$cd : 0;
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if ($id) {
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if ($event = load_event($id)) {
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commonHeader("Event: ".stripslashes(htmlentities($event['sdesc'])));
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display_event($event, 0);
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$begun++;
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}
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else {
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$errors[] = "There is no event for specified id ('".htmlentities($id)."')";
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}
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}
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elseif ($cy && $cm && $cd) {
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if (checkdate($cm,$cd,$cy)) {
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$date = mktime(0,0,1,$cm,$cd,$cy);
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if ($events = load_events($date)) {
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commonHeader("Events: ".date("F j, Y", $date));
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echo "<h2>", date("F j, Y", $date), "</h2>\n";
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foreach ($events as $event) {
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display_event($event, 0);
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}
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$begun++;
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}
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else {
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$errors[] = "There are no events for the specified date (".date("F j, Y",$date).").";
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}
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}
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else {
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$errors[] = "The specified date (".htmlentities("$cy/$cm/$cd").") was not valid.";
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unset($cm); unset($cd); unset($cy);
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}
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}
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if ($cm && $cy && !checkdate($cm,1,$cy)) {
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$errors[] = "The specified year and month (".htmlentities("$cy, $cm").") are not valid.";
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unset($cm); unset($cy);
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}
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if (!$cm) $cm = date("m");
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if (!$cy) $cy = date("Y");
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$date = mktime(0,0,1,$cm,1,$cy);
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if (!$begun) {
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commonHeader("Events: ".date("F Y", $date));
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?>
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<div class="tip">
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<p>If you would like to suggest an upcoming event to be listed on this
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calendar, you can use <a href="submit-event.php">our event submission
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form</a>.</p>
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<p>You can click on each of the events for details, or on the number for a day
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to get the details for all of the events taking place that day.</p>
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</div>
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<?php
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}
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$events = load_events($date,1);
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if (isset($errors) && $errors) {
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display_errors($errors);
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commonFooter();
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exit(0);
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}
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# beginning and end of this month
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$bom = mktime(0,0,1,$cm, 1,$cy);
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$eom = mktime(0,0,1,$cm+1,0,$cy);
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# last month and next month
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$lm = mktime(0,0,1,$cm,0,$cy);
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$nm = mktime(0,0,1,$cm+1,1,$cy);
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echo '<br /><table bgcolor="#d0d0d0" width="100%" border="0" cellspacing="0" cellpadding="3">',
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"\n<tr>", '<td align="left" width="33%"><a href="', $PHP_SELF,
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strftime('?cm=%m&cy=%Y">%B, %Y</a></td>', $lm),
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'<td align="center" width="33%">', strftime('<b>%B, %Y</b></td>', $bom),
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'<td align="right" width="33%"><a href="', $PHP_SELF,
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strftime('?cm=%m&cy=%Y">%B, %Y</a></td>', $nm),
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"</tr>\n</table>\n";
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# begin the calendar
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echo '<table id="cal" bgcolor="#f0f0f0" width="100%" border="1" cellspacing="0" cellpadding="3">',
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"\n",'<tr bgcolor="#a0a0a0">',"\n";
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for ($i = 0; $i < 7; $i++) {
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echo '<th width="14%">', date("l",mktime(0,0,1,4,$i+1,2001)), "</th>\n";
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}
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echo "</tr>\n<tr>";
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# generate the requisite number of blank days to get things started
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for ($days = $i = date("w",$bom); $i > 0; $i--) {
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echo '<td bgcolor="#d0d0d0"> </td>';
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}
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for ($i = 1; $i <= date("t",$bom); $i++) {
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echo '<td valign="top"><a class="day" href="',
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$PHP_SELF, "?cm=$cm&cd=$i&cy=$cy",
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'">',$i,'</a>';
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display_events_for_day(date("Y-m-",$bom).sprintf("%02d",$i),$events);
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echo '</td>';
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if (++$days % 7 == 0) echo "</tr>\n<tr>";
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}
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# generate the requisite number of blank days to wrap things up
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for (; $days % 7; $days++) {
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echo '<td bgcolor="#d0d0d0"> </td>';
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}
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echo "</tr>\n</table>\n";
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commonFooter();
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# FUNCTIONS
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/* generate the date on which a recurring event falls for a given month */
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/* $bom and $eom are the first and last day of the month to look at */
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function date_for_recur($recur,$day,$bom,$eom) {
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/* $day == 1 == 'Sunday' == date("w",'some sunday')+1 */
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if ($recur > 0) { /* ${recur}th $day of the month */
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$bomd = date("w",$bom) + 1;
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$days = (($day - $bomd + 7) % 7) + (($recur - 1) * 7);
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return mktime(0,0,1, date("m",$bom), $days + 1, date("Y",$bom));
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}
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else { /* ${recur}th to last $day of the month */
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$eomd = date("w",$eom) + 1;
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$days = (($eomd - $day + 7) % 7) + ((abs($recur) - 1) * 7);
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return mktime(0,0,1, date("m",$bom)+1, -$days, date("Y",$bom));
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}
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}
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/* display a <div> for each of the events that fall on a given day */
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function display_events_for_day($day,$events) {
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global $PHP_SELF,$cm,$cy;
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foreach ($events as $event) {
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if (($event['type'] == 2 && $event['start'] <= $day && $event['end'] >= $day)
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|| ($event['start'] == $day)) {
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echo '<div class="event">',
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'<a href="',$PHP_SELF,"?id=$event[id]&cm=$cm&cy=$cy",'">',
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stripslashes(htmlentities($event['sdesc'])),
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'</a></div>';
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}
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}
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}
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/* load a single event from the event list, by id */
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function load_event($id) {
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$fp = @fopen("backend/events.csv",'r');
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if (!$fp) return;
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while (!feof($fp)) {
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$event = read_event($fp);
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if ($event['id'] == $id) {
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fclose($fp);
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return $event;
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}
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}
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fclose($fp);
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return;
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}
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/* load a list of events, either for a particular day or a whole month */
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function load_events($from, $whole_month=0) {
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/* we'll take advantage of the equality behavior of this date format */
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$from_date = date("Y-m-d", $from);
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$bom = mktime(0,0,1,date("m",$from),1,date("Y",$from));
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$eom = mktime(0,0,1,date("m",$from)+1,0,date("Y",$from));
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$to_date = date("Y-m-d", $whole_month ? $eom : $from);
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$events = $seen = array();
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$fp = @fopen("backend/events.csv",'r');
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if (!$fp) return;
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while (!feof($fp)) {
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$event = read_event($fp);
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if(!isset($seen[$event['id']])) $seen[$event['id']] = 1;
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else continue;
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switch ($event['type']) {
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case 3: /* recurring event */
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$date = date_for_recur($event['recur'],$event['recur_day'],$bom,$eom);
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$event['start'] = date("Y-m-d", $date);
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/* falls through: now it is just like a single-day event */
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case 1: /* single-day event */
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if ($event['start'] >= $from_date && $event['start'] <= $to_date) {
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$events[] = $event;
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}
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break;
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case 2: /* multi-day event */
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if (($event['start'] >= $from_date && $event['start'] <= $to_date)
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|| ($event['end'] >= $from_date && $event['end'] <= $to_date)
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|| ($event['start'] <= $from_date && $event['end'] >= $to_date)) {
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$events[] = $event;
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}
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break;
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}
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}
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fclose($fp);
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return $events;
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}
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/* read an event from the event listing */
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function read_event($fp) {
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list(,,,,$sdesc,$id,$ldesc,$url,$recur,$tipo,$sdato,$edato) = fgetcsv($fp,8192);
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@list($recur,$recur_day) = explode(":",$recur,2);
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return array(
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'id' => $id,
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'type' => $tipo,
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'start' => $sdato,
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'end' => $edato,
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'recur' => $recur,
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'recur_day' => $recur_day,
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'sdesc' => $sdesc,
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'url' => $url,
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'ldesc' => base64_decode($ldesc),
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);
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}
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?>
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